diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
commit | 8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch) | |
tree | 4099e8021376c7d8c05bdf8503093d80e9c7bad0 /third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c | |
parent | Initial commit. (diff) | |
download | samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip |
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c')
-rw-r--r-- | third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c b/third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c new file mode 100644 index 0000000..3a6f86b --- /dev/null +++ b/third_party/heimdal/lib/gssapi/krb5/set_sec_context_option.c @@ -0,0 +1,353 @@ +/* + * Copyright (c) 2004, PADL Software Pty Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of PADL Software nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * glue routine for _gsskrb5_inquire_sec_context_by_oid + */ + +#include "gsskrb5_locl.h" + +static OM_uint32 +get_bool(OM_uint32 *minor_status, + const gss_buffer_t value, + int *flag) +{ + if (value->value == NULL || value->length != 1) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + *flag = *((const char *)value->value) != 0; + return GSS_S_COMPLETE; +} + +static OM_uint32 +get_string(OM_uint32 *minor_status, + const gss_buffer_t value, + char **str) +{ + if (value == NULL || value->length == 0) { + *str = NULL; + } else { + *str = malloc(value->length + 1); + if (*str == NULL) { + *minor_status = 0; + return GSS_S_UNAVAILABLE; + } + memcpy(*str, value->value, value->length); + (*str)[value->length] = '\0'; + } + return GSS_S_COMPLETE; +} + +static OM_uint32 +get_int32(OM_uint32 *minor_status, + const gss_buffer_t value, + OM_uint32 *ret) +{ + *minor_status = 0; + if (value == NULL || value->length == 0) + *ret = 0; + else if (value->length == sizeof(*ret)) + memcpy(ret, value->value, sizeof(*ret)); + else + return GSS_S_UNAVAILABLE; + + return GSS_S_COMPLETE; +} + +static OM_uint32 +set_int32(OM_uint32 *minor_status, + const gss_buffer_t value, + OM_uint32 set) +{ + *minor_status = 0; + if (value->length == sizeof(set)) + memcpy(value->value, &set, sizeof(set)); + else + return GSS_S_UNAVAILABLE; + + return GSS_S_COMPLETE; +} + +/* + * GSS_KRB5_IMPORT_RFC4121_CONTEXT_X is an internal, private interface + * to allow SAnon to create a skeletal context for using RFC4121 message + * protection services. + * + * rfc4121_args ::= initiator_flag || flags || enctype || session key + */ +static OM_uint32 +make_rfc4121_context(OM_uint32 *minor, + krb5_context context, + gss_ctx_id_t *context_handle, + gss_const_buffer_t rfc4121_args) +{ + OM_uint32 major = GSS_S_FAILURE, tmp; + krb5_error_code ret; + krb5_storage *sp = NULL; + gsskrb5_ctx ctx = NULL; + uint8_t initiator_flag; + int32_t enctype; + size_t keysize; + krb5_keyblock *key; + + *minor = 0; + + sp = krb5_storage_from_readonly_mem(rfc4121_args->value, rfc4121_args->length); + if (sp == NULL) { + ret = ENOMEM; + goto out; + } + + krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_HOST); + + ctx = calloc(1, sizeof(*ctx)); + if (ctx == NULL) { + ret = ENOMEM; + goto out; + } + + ret = krb5_ret_uint8(sp, &initiator_flag); + if (ret != 0) + goto out; + + ret = krb5_ret_uint32(sp, &ctx->flags); + if (ret != 0) + goto out; + + ctx->more_flags = IS_CFX | ACCEPTOR_SUBKEY | OPEN; + if (initiator_flag) + ctx->more_flags |= LOCAL; + + ctx->state = initiator_flag ? INITIATOR_READY : ACCEPTOR_READY; + + ret = krb5_ret_int32(sp, &enctype); + if (ret != 0) + goto out; + + ret = krb5_enctype_keysize(context, enctype, &keysize); + if (ret != 0) + goto out; + + ctx->auth_context = calloc(1, sizeof(*ctx->auth_context)); + if (ctx->auth_context == NULL) { + ret = ENOMEM; + goto out; + } + + key = calloc(1, sizeof(*key)); + if (key == NULL) { + ret = ENOMEM; + goto out; + } + if (initiator_flag) + ctx->auth_context->remote_subkey = key; + else + ctx->auth_context->local_subkey = key; + + key->keytype = enctype; + key->keyvalue.data = malloc(keysize); + if (key->keyvalue.data == NULL) { + ret = ENOMEM; + goto out; + } + + if (krb5_storage_read(sp, key->keyvalue.data, keysize) != keysize) { + ret = EINVAL; + goto out; + } + key->keyvalue.length = keysize; + + ret = krb5_crypto_init(context, key, 0, &ctx->crypto); + if (ret != 0) + goto out; + + major = _gssapi_msg_order_create(minor, &ctx->order, + _gssapi_msg_order_f(ctx->flags), + 0, 0, 1); + if (major != GSS_S_COMPLETE) + goto out; + +out: + krb5_storage_free(sp); + + if (major != GSS_S_COMPLETE) { + if (*minor == 0) + *minor = ret; + _gsskrb5_delete_sec_context(&tmp, (gss_ctx_id_t *)&ctx, GSS_C_NO_BUFFER); + } else { + *context_handle = (gss_ctx_id_t)ctx; + } + + return major; +} + +OM_uint32 GSSAPI_CALLCONV +_gsskrb5_set_sec_context_option + (OM_uint32 *minor_status, + gss_ctx_id_t *context_handle, + const gss_OID desired_object, + const gss_buffer_t value) +{ + krb5_context context; + OM_uint32 maj_stat; + + GSSAPI_KRB5_INIT (&context); + + if (value == GSS_C_NO_BUFFER) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) { + gsskrb5_ctx ctx; + int flag; + + if (*context_handle == GSS_C_NO_CONTEXT) { + *minor_status = EINVAL; + return GSS_S_NO_CONTEXT; + } + + maj_stat = get_bool(minor_status, value, &flag); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + + ctx = (gsskrb5_ctx)*context_handle; + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); + if (flag) + ctx->more_flags |= COMPAT_OLD_DES3; + else + ctx->more_flags &= ~COMPAT_OLD_DES3; + ctx->more_flags |= COMPAT_OLD_DES3_SELECTED; + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); + return GSS_S_COMPLETE; + } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) { + int flag; + + maj_stat = get_bool(minor_status, value, &flag); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + + krb5_set_dns_canonicalize_hostname(context, flag); + return GSS_S_COMPLETE; + + } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) { + char *str; + + maj_stat = get_string(minor_status, value, &str); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + + maj_stat = _gsskrb5_register_acceptor_identity(minor_status, str); + free(str); + + return maj_stat; + + } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) { + char *str; + + maj_stat = get_string(minor_status, value, &str); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + if (str == NULL) { + *minor_status = 0; + return GSS_S_CALL_INACCESSIBLE_READ; + } + + krb5_set_default_realm(context, str); + free(str); + + *minor_status = 0; + return GSS_S_COMPLETE; + + } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) { + + *minor_status = EINVAL; + return GSS_S_FAILURE; + + } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_TIME_OFFSET_X)) { + OM_uint32 offset; + time_t t; + + maj_stat = get_int32(minor_status, value, &offset); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + + t = time(NULL) + offset; + + krb5_set_real_time(context, t, 0); + + *minor_status = 0; + return GSS_S_COMPLETE; + } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_TIME_OFFSET_X)) { + krb5_timestamp sec; + int32_t usec; + time_t t; + + t = time(NULL); + + krb5_us_timeofday (context, &sec, &usec); + + maj_stat = set_int32(minor_status, value, sec - t); + if (maj_stat != GSS_S_COMPLETE) + return maj_stat; + + *minor_status = 0; + return GSS_S_COMPLETE; + } else if (gss_oid_equal(desired_object, GSS_KRB5_PLUGIN_REGISTER_X)) { + struct gsskrb5_krb5_plugin c; + + if (value->length != sizeof(c)) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + memcpy(&c, value->value, sizeof(c)); + krb5_plugin_register(context, c.type, c.name, c.symbol); + + *minor_status = 0; + return GSS_S_COMPLETE; + } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) { + struct gsskrb5_ccache_name_args *args = value->value; + + if (value->length != sizeof(*args)) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + return _gsskrb5_krb5_ccache_name(minor_status, args->name, &args->out_name); + } else if (gss_oid_equal(desired_object, GSS_KRB5_IMPORT_RFC4121_CONTEXT_X)) { + return make_rfc4121_context(minor_status, context, context_handle, value); + } + + *minor_status = EINVAL; + return GSS_S_FAILURE; +} |